\section{Related work}

\subsection{Making storage systems robust}

\paragraph{Replication:} synchronous (chain replication, hypervisor, remus ...),
 asychonous CFT (paxos, Gaios), asynchoronous BFT (pbft, upright, ZZ, ...)

\paragraph{Local Protection:} checksum, ZFS, iron, ...

\paragraph{End-to-end checks:} SRSFO, SUNDR, Depot, (ZFS is also here)...

\subsection{Making storage systems efficient}

This is especially important for large-scale systems:

xFS, Farsite, Bigtable+GFS,HBase+HDFS, Azure, SILT, Flat Datacenter Storage, .............


